锻压技术

H13锻棒异常内裂的质量分析

英文标题：Quality analysis on abnormal internal crack in H13 forging rod

作者：于彬郭保善李昭澎赵虎姜方

单位：邢台钢铁有限责任公司

关键词：H13锻棒锻造内部裂纹砧型质量分析

分类号：TG316.1+92

出版年,卷(期):页码：2018,43(8):155-158

摘要：

利用具有保护气氛的抽锭式电渣炉生产Φ600 mm H13钢锭并锻造成Φ240 mm的圆棒，锻造后锯切发现锻棒内部出现纵裂。采用化学成分分析、金相检验、断口宏微观检测及酸洗检测等手段对该锻棒内部裂纹进行了全面分析，同时对原始电渣锭材料进行复查。结果表明:H13锻棒化学成分符合要求，无原材料冶金缺陷；裂纹内部无异物，裂纹附近无脱碳层，裂纹呈沿晶断裂特征，周边组织为均匀的球化珠光体。分析内部中心裂纹产生的原因是由于在平砧锻造H13锻棒时，锻棒心部拉应力过大，超过材料的强度极限。

Steel H13 ingot of Φ600 mm was forged into bar of Φ240 mm by gas-protective retracting-type ESR furnace, and longitudinal crack was found inside the forging rod by cutting after forging. Then, the internal crack of the forging rod was comprehensively studied by chemical component analysis, metallographic examination, macroscopic and microscopic observation of fracture and pickling test. Meanwhile, the original ESR ingot materials were inspected again. The results show that the chemical composition of H13 forging rod meets the requirements without metallurgical defects of original material, and there is no foreign body inside the crack and no decarburization near the crack. In addition, the crack is characterized by intergranular fracture with uniform spheroidal pearlite around. The reason of internal crack is that the central tensile stress exceeds the strength limit of material when H13
forging rod is forged by flat anvil.

基金项目：

于彬（1990-），男，学士，工程师 E-mail：18714271141@163.com

参考文献：

［1］李凤艳，马党参，陈再枝，等.高温扩散-超细化H13模具钢的组织和性能
［J］.特殊钢，2008，29（3）：63-65.

Li F Y, Ma D S, Chen Z Z, et al. Structure and properties of high temperature diffused-superfining treated die steel H13
［J］.Special Steel, 2008, 29(3): 63-65.

［2］李长荣，张迁，王鹏. 锻造比对H13模具钢晶粒组织遗传规律的影响
［J］. 锻压技术，2017，42（10）：9-12.

Li C R，Zhang Q，Wang P. Influence of forging ratio on heredity rules of grain structure for die steel H13
［J］. Forging & Stamping Technology，2017，42（10）：9-12.

［3］陈林.成形工艺对H13钢组织和力学性能的影响
［J］.热处理，2011，26（6）：49-52.

Chen L. Effect of forming process on microstructure and mechanical properties
［J］. Heat Treatment, 2011, 26(6): 49-52.

［4］ NADCA#207—2011， Special quality die steel & heat treatment acceptance criteria for die casting dies
［S］.

［5］ GB/T 226—2015，钢的低倍组织及缺陷酸蚀检验法
［S］.

GB/T 226—2015，Etch test for macrostructure and defect of steels
［S］.

［6］李正邦. 电渣冶金的理论与实践
［M］. 北京: 冶金工业出版社, 2010.

Li Z B. Electroslag Metallurgy Theory and Practice
［M］. Beijing: Metallurgical Industry Press, 2010.

［7］田玉新, 蔡海燕，支玉明，等. 影响H13芯棒钢冲击韧性的因素分析
［J］. 宝钢技术, 2009, 5(2): 22-26.

Tian Y X, Cai H Y, Zhi Y M, et al. Analysis of factors influencing H13 mandrel steel′s impact toughness
［J］. Baosteel Technology, 2009, 5(2): 22-26.

［8］孙晓林, 郭汉杰，陈希春，等. 电渣重熔H13钢中一次碳化物形成机制
［J］. 钢铁, 2014, 49(5): 68-73.

Sun X L, Guo H J, Chen X C, et al. Formation mechanism of primary carbide in H13 steel during electroslag remelting process
［J］. Iron & Steel, 2014, 49(5): 68-73.

［9］马强，刘君，孟庆玉.锻造MR曲轴缺陷分析及成因探讨
［J］.锻压技术，2017，42（10）：26-32.

Ma Q, Liu J, Meng Q Y. Defect analysis and mechanism discussion on forged automobile MR crankshaft
［J］. Forging & Stamping Technology, 2017, 42(10): 26-32.

［10］王云飞，曹耕原，岳渊渊,等.叉轴锻造内部裂纹成因分析
［J］.锻压技术，2015，40（12）：7-10.

Wang Y F, Cao G Y, Yue Y Y, et al. Analysis on forging internal cracks of yoke shaft
［J］.Forging & Stamping Technology, 2015, 40(12): 7-10.

［11］丁庆明，何朝辉，丁杰.3Cr2W8V热锻模具断裂失效分析
［J］.热加工工艺，2013，42（7）：229-230.

Ding Q M, He C H, Ding J. Failure analysis of 3Cr2W8V steel hot-forging die
［J］.Hot Working Technology, 2013, 42(7): 229-230.

［12］ GB/T 10561—2005，钢中非金属夹杂物含量的测定标准评级图显微检验法
［S］.

GB/T 10561—2005，Steel-determination of content of nonmetallic inclusion—Micrographic method using standards diagrams
［S］.

［13］吕炎.锻造工艺学
［M］.哈尔滨：哈尔滨工业大学出版社，1980.

Lyu Y. Forging Technology
［M］.Harbin: Harbin Institute of Technology Press,1980.

［14］吕炎.锻件缺陷分析与对策
［M］.北京：机械工业出版社，1999.

Lyu Y. Analysis and Countermeasure of Forging Defects
［M］.Beijing: China Machine Press,1999.

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